Your question is a little confusing, because the line in the text is
exactly the same as the line in your code. But I think you must mean that
it fails if you don't `def i`.
Yes, if you don't declare the variable, then it will be in something
similar to a global scope for this purpose. I think it actually is called a
binding variable and gets scoped to the 'script' level, but I don't quite
understand how the pipeline script relates back to straight groovy. So for
your purposes, yes, it is global if you don't declare the variable. It is
the same with your `previous` variable. If that wasn't declared, it would
not work like you expect.
On Wednesday, October 18, 2017 at 2:46:40 PM UTC-6, Jeff Pearce wrote:
>
> I was wondering whether someone could explain something to me. The job
> below fails, because it seems like the parallel steps are sharing the same
> copy of the variable i in the for loop.
>
> If I change line 3 to for (i = 0; i < 30; i++) { then the job passes. Is
> this expected? It seems like maybe the variable is global if you don't add
> the "def".
>
> def testFunction(theEcho) {
> def previous = -1;
> for (i = 0; i < 30; i++) {
> if (i != previous + 1) {
> error "current '$i' != previous '$previous' + 1"
> }
> previous = i
> sh "echo $i"
> sleep(1)
> }
> }
> pipeline {
> agent any
> stages {
> stage('stage 1') {
> steps {
> parallel(
> 'step 1' : { testFunction('echo hello world 1') },
> 'step 2' : { testFunction('echo hello world 2') },
> 'step 3' : { testFunction('echo hello world 3') },
> 'step 4' : { testFunction('echo hello world 4') },
> 'step 5' : { testFunction('echo hello world 5') },
> 'step 6' : { testFunction('echo hello world 6') },
> 'step 7' : { testFunction('echo hello world 7') },
> 'step 8' : { testFunction('echo hello world 8') },
> 'step 9' : { testFunction('echo hello world 9') },
> 'step 10' : { testFunction('echo hello world 10') }
>
>
> )
> }
> }
> }
> }
>
>
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